Window-frame.



' J. KAHN.

WINDOW FRAME.

APPLICATION FILED rev. 2. I917.

Patented Jan. 28,1919.

,Z'Q V v lowing is a specification.

: ITED' STATES PATENT oFFioE.

JULIUS KEEN, OF YOUNGSTOwN, OHIO, ASSIGNOR TO TRUSSED CONCRETE STEEL COMPANY, OF DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAN.

Be it"known that I, Jomns KAHN a'citizen'of the UnitedStates, and residing at Youngstown, in the county of Mahoning and State of Ohio, have invented a new an Improved Window-Frame, of which .the fol This invention relates to metallic frame- .w'orks adapted for window sashes, and particularly to the joints betwen the lo'ngltudi-r nal and transverse bars which constitute such sashes,and its object is to provide a joint between the bars of a structure of this character which will have a high degree of strength'and rigidity, which shall secure the intersectin members against displacement, and WhlOh shall be simple in construction, easy to assemble and economical to manufacture.

,These and other objects of my invention are attained by the particular formation and arrangement of parts of the intersecting bars or members which are pointed out in the claim.

In the accompanying drawing Figure 1 is a perspective of two intersecting bars con-* nected by-my improved joint. Figs. 2 and '3 are perspectives of the two bars. Fi 4 is a section on the line 4-4 of Fig. 1. ig. 5 is a perspective showing a slightly modified joint.

Similar reference charactersrefer to like parts throughout the several views.

The two intersecting bars are formed with webs 1 and 2 and with flanges 3 and irespectively. If desired, the outer edges of the'webs may be sligh ly heavier than the One of the bars is ing. through the flanges 4 and into the web 2,

and vwith .two other notchesfiparallel to the notch :5 but extending throughthe flanges 4 alone.---Thedistance between the outslde walls of the notches 6' is. referably the width of the flanges 3 of t e other bar. The

1 Specification otletters Patent. Applidationflled November 2, 1917. Serial No. 189,829.

in the edge of its web 1 and wmnow-rnmn.

Patented J an, 28, 1919.

bars are assembled, as shown in Fig. 1,- they ma be secured together by electric welding, if esired.

The metal of the flanges 3 extends around the'ton es 7 and constitutes a link or bridge across t e main cross notch from one tongue 7 to the other and this bridge transmits tension from one portion of the flanges 4 to the other across this gap. The tension member at this side of the web 2 is therefore again complete.

The result '5 a strong sash construction that can be easily and quickly assembled and which may be made permanent by welding the adjacent edges ofthe flanges 3 and 4' together. The tongues 7 may be left full length, as in Fig. 5, or may be shortened as secting T shaped bars, each consisting of a web and two flanges, one of the bars being formed with a main cross notch extending through the flangesand through a portion of the web and with a lateral notch parallel to and on each side of the main notch and extending through the flanges so as to leave a pair of. tongues separated by the main.

vcross notch, the second bar having holes through its flanges to receive said tongues when the second bar 1s fitted into the notch ,in the first, the ed e of the web of thesecond bar being notche to receive the remaining portion of the web of the first bar.

JULIUS KAHN.

50 tlietongues 7 of the first bar. When the 

